WO2016020129A1

WO2016020129A1 - Cartridge holder, multi-chamber cartridges and metering and mixing devices which comprise same

Info

Publication number: WO2016020129A1
Application number: PCT/EP2015/065322
Authority: WO
Inventors: Sibylle SCHÖPS; Thomas KRÜGER; Joachim VOSSKUHL; Roland Andreas Meisner; Ernst Schneider
Original assignee: Basf Coatings Gmbh
Priority date: 2014-08-05
Filing date: 2015-07-06
Publication date: 2016-02-11
Also published as: JP2017530856A; BR112017002020A2; US10464086B2; AU2015299320A1; US20180221898A1; ES2696754T3; MX2017001684A; EP3177391A1; AU2015299320B2; EP3177391B1; PL3177391T3; JP6397119B2

Abstract

The invention relates to metering and mixing devices comprising, i. a cartridge holder (1), having a receptacle (1.1) for multi-chamber cartridges (2), a compressed-air connection (1.2) and a connection (1.3) for an application device, wherein the receptacle (1.1) has an inner tube (1.4) which is arranged coaxially to the walls of the cartridge holder (1) and which is equipped with static mixing elements (1.5), and ii. a multi-chamber cartridge (2) for the cartridge holder (1) according to i., wherein said multi-chamber cartridge comprises an upper portion (2.1), comprising a directional valve (2.1.1); a central portion (2.2) of which the centre is configured as a tubular vacuum (2.2.1) in the direction of the longitudinal axis, and the tubular vacuum (2.2.1) is enclosed by at least two chambers (2.2.2 and 2.2.3), wherein the chambers are tubular and arranged in the direction of the longitudinal axis of the cartridge and adjacent chambers are separated from one another by a common dividing wall (2.2.4) and each chamber is connected to the upper portion (2.1) via at least one respective opening (2.2.5); and comprises a lower portion (2.3) which comprises a piston (2.3.1 and 2.3.2) for each of the chambers, wherein the pistons (2.3.1 and 2.3.2) close off the chambers (2.2.2 and 2.2.3) tightly from below and are connected to one another via cutting devices (2.3.3), and the cutting devices (2.3.3) are arranged such that they are able to sever the common dividing wall (2.2.4) of respectively adjacent chambers when the pistons (2.3.1 and 2.3.2) are displaced in the direction of the upper portion (2.1), wherein the multi-chamber cartridge (2) is arranged in the cartridge holder (1) such that the inner wall of the inner tubes of the multi-chamber cartridge (2) bears tightly on the outer wall of the tube (1.4) of the cartridge holder (1). Furthermore, the invention relates to the above cartridge holder (1) and the above multi-chamber cartridge (2) and also to a multi-chamber cartridge (2) having an integrated static mixing device and to a metering and mixing device comprising the latter. The invention also relates to a method for conveying, metering and mixing a plurality of components and to a method for coating substrates, in each case using the above metering and mixing devices.

Description

Cartridge holders, multi-chamber cartridges and metering and mixing devices comprising them

The present invention relates to a cartridge holder (1),

Multi-chamber cartridges (2) and metering and mixing devices comprising them. Furthermore, the invention relates to a method for promoting

Dosing, mixing and / or application of multicomponent systems using the metering and mixing devices according to the invention.

Multi-component systems in the sense of the present invention are those

Systems whose individual components are stored separately before application and are mixed with one another just before application in the required proportions. Typical multicomponent systems are

For example, at room temperature crosslinking coating agents, such as

for example, paints, but also many sealants or adhesives. For the purposes of the present invention, however, such systems as

Viewed multi-component systems whose individual components do not chemically react with each other, but after mixing of the components changes in physical properties occur. For example, this can be

Viscosity increases after mixing two low-viscosity components without a chemical reaction must take place.

Therefore, various mixing devices are known from the prior art, which are designed differently for the respective purposes. Thus, mixing devices differ as they do in painting, in particular

Spray painting often used heavily from those that are used for adhesives and sealing compounds, such as those offered in many home improvement stores and DIY stores. In these, the material is discharged from the cartridge by plungers, that is to say positively displaceable pistons. Since the mixing devices of the present invention can be used universally, the state of the art for both the

Outlined spray painting process as well as the adhesive and sealant application. Spray painting processes are widely used, for example, without electrostatic paint charging in industrial and artisanal paint shops. The methods are distinguished from other painting methods in particular by the fact that they can be used manually, a high flexibility in terms of the shape, size and materials of the painting objects and the paint selection and the

Paint change possess, are mobile in use and relatively low investment costs with it bring (H. Kittel, "Textbook of coatings and coatings," Second Edition, Volume 9, pp. 26-40, S. Hirzel Verlag Stuttgart Leipzig, 2004).

The spray painting processes can be distinguished essentially in compressed air spraying in the high pressure or low pressure method on the one hand and airless spraying, with or without air assistance.

As the first spray painting process, pneumatic atomization or compressed air spraying was developed around 1900. Even today, compressed air atomization is the most frequently used in industry and trade. When high-pressure spraying, also referred to as conventional spraying or pneumatic spraying, is usually worked with an air pressure of about 2 to 7 bar, while the low-pressure spraying, as HVLP spraying ("High Volume, Low Pressure" syringes or Syringes with a high injection volume flow and low pressure), usually working with an air pressure of 0.2 to 0.7 bar (H. Kittel, ibid).

At the atomizing head, the compressed air flows from an annular opening which is formed by a central bore in the air cap and the paint nozzle arranged therein. Further air jets from different air cap holes serve to regulate the jet shape and aid atomization. Due to the compressed air flowing out at high velocity, a negative pressure area is created directly at the paint nozzle mouth, especially in the case of the pressureless air

Paint supply from a so-called suction cup the Lackausfluss supported by its suction (H. Kittel, ibid).

In addition to the promotion of the paint material from a suction cup is also the possibility of the paint material depending on quantity requirements and viscosity

Conveying systems such as flow cups, pressure vessels or circulation systems of the Supply spray gun nozzle (Figures 1A-D). In Figure 1A, the paint supply is represented by Saugbechersystem, it takes place as shown above by the

Suction effect of the spray air. Typical cup contents are volumes up to about one liter. In Figure 1 B, a flow cup system is shown, wherein the paint supply takes place both by the suction effect of the spray air, as well as supported by the Lack- Gefälledruck. Also in this paint delivery system cup volumes of about one liter are usually not exceeded. Also known as Lackfördersysteme the printing system (Figure 1 C) and the circulation system (Figure 1 D). In the printing system, the paint supply from a pressure tank by support with a pressure of 0.5 to 4 bar (usual tank capacity 1 to 250 liters). At the

Circulating system is pumped by piston or turbine pumps via a loop paint from a non-pressurized container in these. The necessary

Ring line pressure is set via a pressure-holding valve (return control valve). Circulating systems typically only find useful use with a daily consumption of more than 100 liters of the paint (H. Kittel, ibid).

Two-component coating (2K coating) are mainly due to their limited pot life (pot life) with

Spraying process processed. In this case, the dosing of base lacquer and hardener is the central problem. For small series and individual parts, in particular in the refinish area, such as the automotive refinish area, the 2K material is usually mixed manually in the specified ratio and sprayed like a one-component material. In practice, this means that both the dosage and the mixture of components before filling a

Flow cup or suction cup or in the flow cup or suction cup itself and thus also the quality and homogeneity of the mixture depends strongly on the manual skills of the painter. Unused material must be discarded after the pot life has expired. On the other hand, a fast drying and curing behavior of the paint film is desired, which is why curing catalysts are often incorporated into the base paint and / or hardener of the 2K or multi-component mixture.

It is therefore precisely when using 2K or multi-component coating agents, the desire for a long processing or Pot life but at the same time improved drying and faster

Hardness development of the sprayed paint film.

In order to obtain the best possible appearance (appearance) of the cured lacquer film as well as reproducible qualities, it is absolutely necessary to produce as homogeneous as possible consistently high-quality compositions of base lacquer and hardener, which have consistent properties over the entire period of application, which is precisely the case with premixed 2K Systems are not always the case, for example, if a short pot life causes the first sprayed material due to a not yet advanced reaction of the components has a low viscosity, while the later sprayed material residues already partially contain viscosity-increasing crosslinking products.

In the production of large quantities, with short pot lives and high

High quality dosing and mixing systems are used in industry to meet tolerance limits of the dosing accuracy of +/- 5% of the hardener volume in relation to the base varnish quantity.

Further developments aim at pulsation-free dosage and low

System wear, for example through the use of diaphragm feeders. Paint delivery systems with pressure-controlled gear pumps are also known. In multi-component systems, the flow rates of the individual gear pumps are matched. For mixing static or dynamic systems are used with driven mixing units. In the case of very short pot lives, special guns are also used in which base lacquer and hardener are discharged from separate nozzles and the resulting droplets mix in the spray jet (H. Kittel, ibid).

Especially in small paint shops, however, there is a need for much less expensive conveyor, metering and mixing devices. In particular, it should not be necessary to use the abovementioned special pistols or

highly specialized dosing and mixing units. The simplicity of use of suction cups or fluid cups should be preserved. Delivery, metering and mixing should only be done by applying pressure. An additional external propulsion, metering or mixing drive should not to be required. In particular, no drive by pumps and the like should be necessary. Nevertheless, an almost independent of the pot life should

Processability remain ensured, with simultaneous homogeneous mixing of the components before they reach the nozzle of the spray gun, preferably the spray gun itself, or another application device. The obtained

Paint films should have good drying and rapid development of hardness and lead to cured films with good appearance.

WO 93/13872 A1 describes a method for applying a

A multi-component refinish coating composition wherein at least two paint components are held in separate containers and at least one component is supplied under pressure to a kinetic dosing system comprising two piston-mounted double-acting cylinders with cylinder rods. The metered components are fed to a mixer, which opens into a paint spray gun. The structure of the metering device is rather complex.

WO 2013/104771 A1 discloses a device for conveying, metering and mixing of liquid coating components, comprising a paint supply device, the two or more paint reservoirs each having at least one

Exhaust opening for various paint components to be mixed together comprises; or a paint reservoir comprising two or more chambers for different paint components to be mixed together, each chamber having at least one outlet port. The device comprises

Furthermore, a metering device, which is connected downstream of the Lackzuführvorrichtung and one of the number of outlet openings of the paint reservoir or the

Lackvorratsbehälters corresponding number of inlet openings for the

Paint components has, wherein the metering device is designed so that the entering via the inlet openings of the flow rates of the paint components to be mixed together are conveyed separately from each other via serving as dosing units, rotating conveyors and the

Conveyors are interconnected so that their speeds are in fixed proportions to each other, and wherein the metering device has separate outlet openings for the now metered volume flows of the paint components. Furthermore, the device has a static mixing device, the Dosing device is connected downstream and has one of the number of outlet openings of the metering device corresponding number of inlet openings for the metered volume flows, and whose output is designed so that it can be connected to a paint spray gun.

A simple multi-chamber cartridge for the mixing and application of multicomponent adhesives with at least two concentrically arranged chambers is described in GB 2 276 365 A.

DE 30 31 798 A1 also discloses a squeezing device for

Multi-component materials, in particular Mehrkomponentenklebe-, sealing or filling compounds with juxtaposed containers, which are separated by extending parallel to the pressing device partitions. Each container has a pressure piece associated therewith, wherein the pressure pieces are connected to each other via a web having a cutting edge which cuts through the partitions of the container during the pressing. The container can be arranged coaxially to each other and the connection of the plungers can be done by a realized as a piston rod web, which can be operated for example via a gas column. A mixing of the components takes place in a chamber, which connects as a tip to the two containers in the pressing direction.

Of a similar construction makes the described in EP 2 353 733 A1

Metering gun use, however, wherein the cutting edges spirally cut the intermediate wall of the container of the coaxial cartridge. According to EP 2 353 733 A1, the ejection device according to DE 30 31 798 A1 has the disadvantage that the cut-open partition wall could prevent a further depression of the piston, which should be avoided by the helical cutting.

In US 2004/0129122, the problem addressed in EP 2 353 733 A1 was attempted in a different way, namely by pressing the cut-off partition wall against the inner wall of the outer tube via a baffle plate.

US 4,493,436 describes a similar to the two aforementioned devices device but not coaxially arranged chambers. British Patent Application GB 2 246 172 discloses a complex construction of a two-chamber cartridge in which a concertina-like structure of a chamber is realized and the chambers are joined in the pressing direction by a static mixer.

DE 10 2010 019 220 A1 discloses a cartridge system with connected conveying bodies, in particular for mixing and applying a medical cement. The delivery pistons can be operated with gas pressure. However, a central mixing chamber shown in the figures of this document is closed on one side and can, if at all, only partially the mixing of the

Serve components. It does not replace the necessary mixing in the area of the outlet opening of the cartridge or syringe. In addition, the material chambers are very small due to the required path of the delivery piston, so that a poor utilization of the total volume of the device by the

Cement components takes place.

All the above devices have in common is that these are the

Auspressrichtung subsequent mixing sections have, as a simple

Mixing chambers or simple static mixer are executed. All mixing lines are either very short and not for demanding mixing operations like the

Mixture of two- or multi-component paints suitable, especially not for the automotive paint sector or the dosage and mixing is designed complex. Especially here is an absolutely homogeneous mixing basic requirement for an excellent appearance. However, the attachment of long mixing lines would greatly increase the design of the prior art cartridges, rendering them unwieldy in manual operation.

Therefore, there is a need for metering and mixing devices that ensure accurate metering of the components to be mixed, especially in the mixing of, especially for demanding mixing operations

Components of different viscosities. In addition, the dosing and

Mixing devices have a low construction height with the longest possible mixing section. The operation of the metering and mixing device should be possible without be movable components possible, wherein the promotion of the materials to be mixed by compressed gases, in particular compressed air should be done. The mixing should be superior to the mixing variants known from the prior art, without the mixing section leading to an additional construction height of the cartridges to be used in the metering and mixing device. In addition, the mixing elements of the static mixer of the metering and mixing device should be easy to clean, if possible, even in the whereabouts of the components in the cartridge of the metering and mixing device. However, components that are not completely used up should also be able to be removed from the dosing and mixing device in a simple manner with the cartridge for storage.

The above objects have been achieved by the inventors of the present invention surprisingly by providing a metering and mixing device which does not have the disadvantages of the prior art and which meets the above requirements.

The attached Figures 1A, 1B, 1C, 1D, 2, 3 and 4 are illustrative of the present invention. In this case, Figures 1A, 1B, 1C and 1D relate to the prior art. FIG. 2 shows a cartridge holder according to the invention, FIG. 3 shows a cartridge according to the invention and FIG. 4 shows a metering and mixing device according to the invention. The following reference symbols are used in FIGS. 2 to 4:

(1) cartridge holder, (1 .1) receptacle for multi-chamber cartridges, (1 .1 .1) inner wall of the cartridge holder, (1 .2) compressed air connection, (1 .3) connection for an application device, (1 .4) internal tube, (1 .5) static mixing elements,

(2) multi-chamber cartridge, (2.1) upper section of the multi-chamber cartridge, (2.1 .1) directional control valve, (2.2) middle section of the multi-chamber cartridge, (2.2.1)

tubular space, (2.2.2) and (2.2.3) chambers, (2.2.4) partition between adjacent chambers, (2.2.5) openings of the chambers of the central portion of the multi-chamber cartridge towards the upper portion of the multi-chamber cartridge, (2.2.6 ) Outer wall of the middle section of the multi-chamber cartridge, (2.3) lower section of the multi-chamber cartridge, (2.3.1) and (2.3.2) piston, (2.3.3)

Cutting device, (3) bayonet closure, (4) connection for flushing media, (A) cutting surface in the dividing wall of two adjacent chambers, (B) cut in the dividing wall of two adjacent chambers. The dosing and mixing device according to the invention comprises

i. a cartridge holder (1) comprising

(a) a receptacle (1 .1) for multi-chamber cartridges (2),

(b) one compressed air connection (1 .2) and one connection (1 .3) for one

Application device, wherein

(c) the receptacle (1 .1) is coaxial with the walls of the

Cartridge holder (1) arranged inside pipe (1 .4), which is equipped with static mixing elements (1 .5), and ii. a multi-chamber cartridge (2) for the cartridge holder (1) according to i., comprising the following sections:

an upper portion (2.1) comprising a directional control valve (2.1 .1);

a middle section (2.2) whose center is designed in the direction of the longitudinal axis as a tubular void (2.2.1), and the tubular void (2.2.1) of at least two chambers (2.2.2 and 2.2.3) is enclosed, wherein the chambers are arranged tubular and in the direction of the longitudinal axis of the cartridge and adjacent chambers are separated by a common partition wall (2.2.4) and each chamber is connected to the upper section (2.1) via at least one opening (2.2.5); and

a lower section (2.3) comprising for each of the chambers a piston (2.3.1 and 2.3.2), wherein the piston (2.3.1 and 2.3.2) the chambers (2.2.2 and 2.2.3) from below close tightly and connected to each other via cutting devices (2.3.3), and the cutting devices (2.3.3) are arranged so that they the common partition (2.2.4) each adjacent chambers when moving the piston (2.3.1 and 2.3. 2) in the direction of the upper portion (2.1) capable of being severed, wherein the multi-chamber cartridge (2) is arranged in the cartridge holder (1), that the tubular empty space (2.2.1) of the multi-chamber cartridge (2) by the tube (1. 4) of the cartridge holder (1) is filled and the outer wall (2.2.6) of the central portion (2.2) of the multi-chamber cartridge (2) on the

Inner wall (1 .1 .1) of the cartridge holder (1) rests positively. As used herein, a "tubular chamber" means that the chamber is shaped in the shape of a straight hollow cylinder, the cavity forming the chamber. In the simplest case, the cross-sectional area of the chamber is a

Annular ring, but also other cross-sectional surface geometries are conceivable such as segments of circular rings. Thus, an annular cross-sectional area can also be subdivided into two or more, equal or different sized segments. As boundaries of the segments in this case serve the partitions of adjacent chambers. Of course, almost any other geometries can be realized, for example, can also take the place of the straight hollow cylinder with annular segment-shaped cross-sectional area, individual tubes with a circular cross-sectional area.

Another object of the invention is a cartridge holder (1) comprising

(A) a receptacle (1 .1) for multi-chamber cartridges (2), and

(b) one compressed air connection (1 .2) and one connection (1 .3) for one

Application device, wherein

(C) the receptacle (1 .1) has a coaxial with the walls of the cartridge holder (1) arranged, inner tube (1 .4), which is equipped with static mixing elements (1 .5).

The invention also provides a multi-chamber cartridge (2) for a

Cartridge holder (1) of the abovementioned type, comprising the following sections:

an upper portion (2.1) comprising a directional control valve (2.1 .1);

a middle section (2.2) whose center is designed in the direction of the longitudinal axis as a tubular void (2.2.1), and the tubular void (2.2.1) of at least two chambers (2.2.2 and 2.2.3) is enclosed, wherein the

Chambers are arranged tubular and in the direction of the longitudinal axis of the cartridge and adjacent chambers are separated by a common partition (2.2.4) and each chamber is connected to the upper portion (2.1) via at least one opening (2.2.5); and

a lower section (2.3), which for each of the chambers a piston (2.3.1 and

2.3.2), whereby the pistons (2.3.1 and 2.3.2) tightly seal the chambers (2.2.2 and 2.2.3) from below and are connected with each other via cutting devices (2.3.3) are connected, and the cutting devices (2.3.3) are arranged so that they the common partition wall (2.2.4) respectively adjacent chambers when

Moving the piston (2.3.1 and 2.3.2) in the direction of the upper section (2.1) able to cut.

Preferably, the multi-chamber cartridge (2) is designed as a coaxial cartridge for a cartridge holder (1) as defined above, comprising the following sections:

an upper portion (2.1) comprising a directional control valve (2.1 .1);

Chambers are arranged coaxially in the direction of the longitudinal axis of the cartridge and adjacent chambers are separated by a common partition (2.2.4) and each chamber is connected to the upper portion (2.1) via at least one opening (2.2.5); and

a lower section (2.3) comprising for each of the chambers a piston (2.3.1 and 2.3.2), wherein the piston (2.3.1 and 2.3.2) the chambers (2.2.2 and 2.2.3) from below close tightly and connected to each other via cutting devices (2.3.3), and the cutting devices (2.3.3) are arranged so that they the common partition wall (2.2.4) respectively adjacent chambers during

Such a construction can be obtained, for example, by coaxial arrangement of three tubes, in which case the inner tube encloses the tubular empty space (2.2.1). The space between the outer surface of the inner tube and the inner surface of the middle tube forms, closed towards the lower portion (2.3) by a piston (2.3.1) and towards the upper portion (2.1) through an opening (2.2 .5) to the upper section (2.1), a first chamber (2.2.2). The space between the outer surface of the middle tube and the inner surface of the outer tube, forms towards the lower section (2.3) by a piston (2.3.2) completed and completed in the direction of the upper section (2.1) through an opening (2.2.5) to the upper section (2.1), a second chamber (2.2.3).

The tubular empty spaces (2.2.1) of the aforementioned cartridges serve to receive the inner tube (1 .4) of the cartridge holder (1). If the tube-shaped empty space (2.2.1) is enclosed by a tube, it also extends through the lower section (2.3) of the cartridge.

In a particular embodiment, the inner tube (1 .4) of the

Cartridge holder in the cartridge holder (1) missing and already in the

Multi-chamber cartridge (2) to be integrated. That is, in such a case, the cartridge holder (1) does not need to have an inner tube (1 .4) and thus is an ordinary cartridge holder, since in this embodiment, the static mixing elements (1 .5) are already integrated in the multi-chamber cartridge (2) are. This has the advantage that a simple cartridge holder without inner tube (1 .4) can be used.

Such a metering and mixing device according to the invention likewise comprises

i. a cartridge holder (1) comprising

(A) a receptacle (1 .1) for multi-chamber cartridges (2), and

(B) an arranged compressed air connection (1 .2) and a connection (1 .3) for an application device, and

ii. a multi-chamber cartridge (2) for a cartridge holder (1) according to i., Wherein

includes the following sections:

an upper portion (2.1) comprising a directional control valve (2.1 .1);

a middle section (2.2) whose center is designed in the direction of the longitudinal axis as a tubular space equipped with static mixing elements (1 .5) and preferably provided with a sealing device at the lower end, and the tubular space of at least two chambers (2.2.2 and 2.2.3) is enclosed, wherein the chambers are arranged tubular and in the direction of the longitudinal axis of the cartridge and adjacent chambers separated by a common partition wall (2.2.4) and each chamber is connected to the upper section (2.1) via at least one opening (2.2.5); and

a lower section (2.3) comprising for each of the chambers a piston (2.3.1 and 2.3.2), wherein the piston (2.3.1 and 2.3.2) the chambers (2.2.2 and 2.2.3) from below close tightly and over each other

Cutting devices (2.3.3) are connected, and the cutting devices (2.3.3) are arranged so that they the common partition (2.2.4) each adjacent chambers when moving the piston (2.3.1 and 2.3.2) in the direction of The upper portion (2.1) is capable of being severed, wherein the multi-chamber cartridge (2) is arranged in the cartridge holder (1) that the outer wall (2.2.6) of the central portion (2.2) of the multi-chamber cartridge (2) on the inner wall (1 .1 .1) of the cartridge holder (1) rests positively.

A multi-chamber cartridge (2) suitable for this embodiment thus comprises: an upper section (2.1) comprising a directional control valve (2.1 .1);

a middle section (2.2) whose center is designed in the direction of the longitudinal axis as a tubular space provided with static mixing elements (1 .5), and the tubular space is enclosed by at least two chambers (2.2.2 and 2.2.3), the Chambers are arranged tubular and in the direction of the longitudinal axis of the cartridge and adjacent chambers are separated by a common partition (2.2.4) and each chamber is connected to the upper portion (2.1) via at least one opening (2.2.5); and a lower section (2.3) comprising for each of the chambers a piston (2.3.1 and 2.3.2), the pistons (2.3.1 and 2.3.2) defining the chambers (2.2.2 and 2.2.3) of down close and connected to each other via cutting devices (2.3.3), and the cutting devices (2.3.3) are arranged so that they the common partition wall (2.2.4) respectively adjacent chambers when

In a further preferred embodiment of the aforesaid multichamber cartridge (2) with integrated static mixer, it is a coaxial cartridge, comprising the following sections:

an upper portion (2.1) comprising a directional control valve (2.1 .1); a middle section (2.2) whose center is designed in the direction of the longitudinal axis as a tubular space provided with static mixing elements (1 .5), and the tubular space is enclosed by at least two chambers (2.2.2 and 2.2.3), the Chambers are arranged coaxially in the direction of the longitudinal axis of the cartridge and adjacent chambers are separated by a common partition (2.2.4) and each chamber is connected to the upper portion (2.1) via at least one opening (2.2.5); and

For all embodiments of the cartridges, these preferably contain different components to be mixed for use as conveying, metering and mixing units in the individual chambers. Especially

Components which may mix with each other after mixing or should be stored separately for other reasons. For example, base lacquers and their hardeners can be stored separately in the chambers of the cartridges or low-viscosity liquids which build up a higher viscosity or thixotropy only after they have been mixed. However, differently colored components such as, for example, a black filler component and a white filler component may also be mixed to a gray blend.

Due to the freely selectable in the production of cartridges volumes of the chambers, the components to be mixed can be stored separately in the required proportions for later application. In the preferred coaxial cartridges, the volumes of the chambers are defined by the diameters of the tubes. For all embodiments, the

Volume flows of the components, such as the master varnish and hardener, separated from each other to be supplied as a directional control valve (2.1 .1) of the upper section (2.1). The directional control valve (2.1 .1) is particularly preferably a 3/2-way valve (2.1 .1). The directional control valve (2.1 .1) or 3/2-way valve (2.1 .1), in a preferred embodiment, also in the directional control valve (2.1 .1) integrated

Have premixing in which meet the first separate volume flows of the components to each other and can mix. If the directional control valve (2.1 .1) is in the "dosing / mixing" position, ie in the working position, then the components which are premixed either in the premixing chamber integrated in the directional control valve (2.1 .1) or as far as possible in the absence of such a premixing chamber The mixing section is either the inner tube (1 .4) in the cartridge holder (1), which is equipped with static mixing elements (1 .5), or the tubular with static mixing elements (1 .5). equipped room of the variant also described above

Multi-chamber cartridge (2). In both cases, before the first static mixing elements (1 .5) located in the mixing section, a region free from static mixing elements (1 .5) can be present as premixing path.

The supply of the components for as a directional control valve (2.1 .1) via the piston (2.3.1 and 2.3.2), which close the chambers from below. The pistons (2.3.1 and 2.3.2) press pneumatically driven the corresponding

Components from their chambers in the upper section (2.1) of the

Multi-chamber cartridge (2). Here, by the cutting device (2.3.3), which connects the pistons (2.3.1 and 2.3.2), the partition (2.2.4) between the

Chambers severed, whereby only a further emptying of the chambers is possible. In all embodiments, the cutting device (2.3.3) connects the pistons (2.3.1 and 2.3.2) serving as the bottom of the chambers, which also ensures that the pistons (2.3.1 and 2.3.2) are pressurized when pressurized be moved simultaneously and thus, even with very different viscous components, the pressing out of the components of the chambers in the ratio of

Chamber sizes to each other and thus independent of viscosity occurs. The emptying is therefore done in the predetermined by the chamber size volumes and thus in the desired dosage. After an optional premix in the optional directional control valve (2.1 .1) integrated Vornnischkannner in the upper section (2.1) of the cartridge, the components through the inner tube (1 .4) of the cartridge holder (1) or when using a cartridge with integrated static mixer against the direction of extrusion of the separated components from the chambers through the static mixing elements ( 1 .5) and mixed homogeneously.

The components stored in the separate chambers can thus either already be integrated in a directional control valve (2.1 .1) of the upper section (2.1)

Premixing chamber, an optionally existing section between the directional control valve (2.1 .1) and the first static mixing elements (1 .5) or in contact with the static mixing elements (1 .5) come into contact with each other.

In a particular embodiment, the static mixing device consists of a mixing tube with fixed internals. Preferably, so-called mixer rods can be used. Very particularly preferred mixer bars are, for example, from the company Fluitec Georg AG (Neftenbach, Switzerland) under the name CSE-X® mixer or from the company Industra GmbH (Heusenstamm, Germany) under the name "mixing element" with the article number 205059 (76-104 ) available.

The cartridge holder (1) has a compressed air connection (1 .2), which is preferably arranged at the bottom of the receptacle (1 .1) and a connection (1 .3) for an application device. The placement of the compressed air connection (1 .2) is such that the compressed air flowing in during operation moves the pistons (2.3.1 and 2.3.2) serving as the bottom of the chamber so that the components can be forced out of the chambers.

The cartridge holder (1) can be closed in all embodiments of the invention with a lid, which then the multi-chamber cartridge (2) in

Cartridge holder (1) fixed. For the operation of the metering and mixing device according to the invention in such a case, an inventive

Multi-chamber cartridge (2) inserted into the cartridge holder (1) and the

Cartridge holder (1) is closed with a pressure tight lid. The type of closure is not relevant in this case, for example, a Schraubgewinde- be used, or in a particularly preferred embodiment, a bayonet closure (3), in particular a safety bayonet closure. Cartridge holder (1) and multi-chamber cartridge (2) are then adapted to the type of closure of the lid. Thus, in the case of using a screw cap, the cartridge holder (1) has a thread suitable for this purpose or is provided with a corresponding material stiffening when using a bayonet closure (3) for receiving the grooves, wherein the multi-chamber cartridge (2) is equipped with webs for the bayonet closure.

However, it is also possible to operate the metering and mixing devices according to the invention without a lid. The fixation of the multi - chamber cartridge (2) in

Cartridge holder (1) is then by the formation of the upper portion (2.1) of the cartridge and the holder, wherein the same types of closure as in the lid variant can be realized.

The cutting device (2.3.3) for cutting through the wall between two adjacent component chambers (2.2.2 and 2.2.3) is preferably designed as a wedge-shaped gap, similar to an open scissors. Thus, a material compression can be prevented when cutting the partitions and at the same time the Anschneidekraft be reduced.

The connection of the terminal (1 .3) at the bottom of the receptacle (1 .1) of the cartridge holder (1) with an application device is not a problem and can be done with all common compounds, preferably by a screw thread or quick couplings or dovetail connections. It is also possible to integrate static mixing elements (1 .5) into the connection (1 .3) or to install the internal pipe (1 .4) equipped with static mixing elements (1 .5) in the cartridge holder (1) through the connection (1 .3) or

Extend the connection area to the connected application device.

In principle, any type of application device is suitable as the application device. The application devices are used for applying the mixed components, which are preferably coating agents such as paints, Spatula, sealants or adhesives are on substrates. Thus, for example, come sponges, brushes, rollers, squeegees or nozzles of various kinds, such as flat spray nozzles, wide jet nozzles, slot dies, multi-channel (fan) nozzles or round jet nozzles, while the nozzles can be used with and without atomizing air. A very particularly preferred

Application device represent spray guns, preferably those for

Spray application of coating compositions.

As spray guns in principle all spray guns are suitable, which are used in compressed air spraying. The connection of the terminal (1 .3) at the bottom of the receptacle (1 .1) of the cartridge holder (1) with the spray gun is not a problem and can be done with all common compounds, preferably by a screw thread or quick couplings or

Dovetail joints. Paint spray guns are available, for example, from Sata GmbH & Co. KG (Kornwestheim, Germany) under the name SATAjet®, as HVLP or RP spray guns.

All components and materials of the dosing and mixing device are chosen so that they are designed for the pressures occurring and their intended function and chemically largely inert to the mixed and the mixed components. In particular, find polypropylene for the walls of the chambers or tubes application. As pistons (2.3.1 and 2.3.2) are usually suitable polyethylenes, polycarbonates and / or composite materials and as a material for the cutting device (2.3.3) polycarbonate. The dosing and

However, mixing apparatus and components thereof are not limited to these materials. In particular, metals, for example for the

Implementation of the cutting device (2.3.3) are used or coated materials, for example, to allow an inert behavior against any chemically aggressive components.

The cleaning of the metering and mixing devices according to the invention can be carried out in a simple way via the directional control valve (2.1 .1), wherein the multi-chamber cartridge (2) during cleaning in the receptacle (1 .1) may remain. For this purpose, in the upper section (2.1) of the multi-chamber cartridge (2) located directional control valve (2.1 .1) moves from its "dosing / mixing" operating position to the "rinse" cleaning position. In the "Dosing / Mixing" operating position, the

Components are pushed out of the chambers in the directional control valve (2.1 .1), while simultaneously blocking the flushing connection (4), while in the

Cleaning position "Rinse" the supply of components from the

Component chambers is interrupted and the central mixing channel with a flushing connection (4) can be connected. The rinse is done with a

Rinsing medium, preferably with commercially available solvents and / or water, wherein the rinsing medium may contain, if desired or required, additional detergents and / or other typical detergent additives. The flushing can be done with or without air pulses. The flushing medium should be able to dissolve the components of the multicomponent system and any reaction products as completely as possible. During rinsing, the rinsing medium is passed through the static mixing device, in order to free the static mixing elements (1 .5) in particular from the adhering component mixture and optionally already formed reaction products. After cleaning, the

Multi-chamber cartridge (2) easily remove and store the dosing and mixing device.

The present invention also relates to a process for conveying, metering and mixing two or more components, preferably paint components, adhesive components or sealant components, more preferably

Paint components, which of the dosing and

Mixing device makes use of.

Furthermore, the present invention relates to a method for coating substrates with 2K or multi-component coating compositions using the metering and mixing device according to the invention in combination with an application device, preferably a paint spray gun. The

Coating process according to the invention is carried out particularly advantageously purely manually. In particular, the inventive method for

Coating suitable using small amounts of paint. Preferably, the process is carried out as a HVLP spraying process. Most preferably, it is used in automotive refinish. The aforementioned method can However, also be used in the context of an OEM OEM, especially in the so-called assembly repair.

The inventive method for coating substrates with 2K or multi-component coating compositions using the metering and mixing device according to the invention in combination with an application device comprises, in a particular embodiment, a rinsing step. At this

Process variant is the application of the 2-component or

Multi-component coating agent interrupted once or several times, the multi-chamber cartridge (2) is cleaned within the interruption of the application and the application is continued after cleaning the multi-chamber cartridge (2) with the same multi-chamber cartridge (2) or other multi-chamber cartridge (2) according to the invention. When cleaning the static

Rinsed mixing device of the dosing and mixing device according to the invention. In this case, the multi-chamber cartridge (2) according to the invention can advantageously remain in the cartridge holder (1). However, it can also be removed for the rinsing process or after the rinsing process in order to be used again to continue the coating.

If the process is carried out as HVLP spraying method, then the

Atomizing pressure usually 1, 5 to 2 bar. In the case of RP guns, work is usually carried out at an atomization pressure of 1.5 to 3 bar.

If two components are used, one component may be, for example, a so-called parent lacquer and the second component may be a hardener tailored to the master lacquer. In the

Base stocks are preferably hydroxy-functional polymers such as polyhydroxy-functional poly (meth) acrylates, polyester polyols, polyether polyols, polyurethane polyols or mixed polyester / polyether polyols used. Polythiols, for example, can be used. In the hardener components are usually polyisocyanates such as hexamethylene diisocyanate, tolylene diisocyanate, isophorone diisocyanate or diphenylmethane diisocyanate or the dimers, trimers and polymers of the aforementioned isocyanates, and / or aminoplast resins such

For example, melamine resins used. Also usable are epoxy systems, both conventional and aqueous. Of course, it is also possible to use systems which only become reactive at atmospheric humidity (eg aldimines, silanes). In general, however, parent lacquer and hardener have compounds with complementary functional groups. That is, groups that react with each other after mixing the two components. For example, the following complementary groups may be mentioned: amine / isocyanate, hydroxy / isocyanate, thiocyanate, amine / epoxy / isocyanate, amine / epoxy resin, epoxy / anhydride, amine / anhydride , Anhydride / hydroxy, hydroxy / isocyanate / amine, or carbodiimide / carboxyl, thiol / ene, amine / cyclocarbonate, hydroxyl / cyclocarbonate, amine / hydroxyl / cyclocarbonate, oxazoline - / carboxyl, silane-silane, silane / hydroxyl groups. Usually base lacquer and hardener react after application at temperatures of 0 to 100 ° C, preferably 10 to 80 ° C, that is under conditions conventional refinish conditions.

In the process according to the invention, it is also possible to select those masterbatch-hardener combinations which, in the conventional procedure of the

Premix the components before filling the paint reservoir, too short pot life. Even with such systems excellent coatings are obtained, which are characterized by short drying and curing times and an excellent appearance.

Claims

claims

1 . Comprising dosing and mixing device,

i. a cartridge holder (1) comprising

(A) a receptacle (1 .1) for multi-chamber cartridges (2), and

(b) one compressed air connection (1 .2) and one connection (1 .3) for one

Application device, wherein

(c) the receptacle (1 .1) is coaxial with the walls of the

an upper portion (2.1) comprising a directional control valve (2.1 .1);

a middle section (2.2) whose center is designed in the direction of the longitudinal axis as a tubular void (2.2.1), and the tubular void (2.2.1) of at least two chambers (2.2.2 and 2.2.3) is enclosed, wherein the chambers are arranged tubular and in the direction of the longitudinal axis of the cartridge and adjacent chambers are separated by a common partition (2.2.4) and each chamber (2.2.2 and 2.2.3) with the upper portion (2.1) via at least one Opening (2.2.5) is connected; and

a lower section (2.3) comprising for each of the chambers a piston (2.3.1 and 2.3.2), wherein the piston (2.3.1 and 2.3.2) the chambers (2.2.2 and 2.2.3) from below close tightly and connected to each other via cutting devices (2.3.3), and the cutting devices (2.3.3) are arranged so that they the common partition wall (2.2.4) respectively adjacent chambers (2.2.2 and 2.2.3) when moving the piston (2.3.1 and 2.3.2) can be cut in the direction of the upper section (2.1),

wherein the multi-chamber cartridge (2) is arranged in the cartridge holder (1) such that the tubular empty space (2.2.1) of the multi-chamber cartridge (2) is positively filled by the tube (1 .4) of the cartridge holder (1) and the outer wall (2.2.6) of the middle section (2.2) of the multi - chamber cartridge (2) at the

Inner wall (1 .1 .1) of the cartridge holder (1) rests positively.

2. Cartridge holder (1) for a dosing and mixing device according to claim 1, comprising

(A) a receptacle (1 .1) for multi-chamber cartridges (2), and

(B) a compressed air connection (1 .2) and a connection (1 .3) for an application device, wherein

(c) the receptacle (1 .1) is coaxial with the walls of the

Cartridge holder (1) arranged inside pipe (1 .4), which is equipped with static mixing elements (1 .5).

3. Multi-chamber cartridge (2) for a dosing and mixing device according to claim

1, which comprises the following sections:

an upper portion (2.1) comprising a directional control valve (2.1 .1);

a central section (2.2) whose center is designed as a tubular empty space (2.2.1) in the direction of the longitudinal axis, and the tubular empty space (2.2.1) of at least two chambers (2.2.2 and 2.2.3)

is enclosed, wherein the chambers are arranged tubular and in the direction of the longitudinal axis of the cartridge and adjacent chambers by a common partition (2.2.4) are separated from each other and each chamber with the upper portion (2.1) via at least one opening (2.2.5 ) connected is; and

Cutting devices (2.3.3) are connected, and the cutting devices (2.3.3) are arranged so that they the common partition (2.2.4) each adjacent chambers when moving the piston (2.3.1 and 2.3.2) in the direction of upper section (2.1) can be severed.

4. multi-chamber cartridge (2) according to claim 3, wherein

the tubular empty space (2.2.1) is enclosed by at least two chambers (2.2.2 and 2.2.3), the chambers being arranged in a tubular manner and coaxially in the direction of the longitudinal axis of the cartridge.

5. multi-chamber cartridge (2) according to claim 4, wherein it has a tubular space (2.2.1) and two chambers (2.2.2 and 2.2.3), and the empty space and the two chambers (2.2.2 and 2.2.3) are formed by a coaxial arrangement of three tubes, with an inner tube enclosing the tubular empty space (2.2.1), the outer surface of the inner tube and the inner surface of the middle tube, forming a first chamber (2.2.2) which is in Completed in the direction of the lower portion (2.3) by a piston (2.3.1) and in the direction of the upper portion (2.1) through an opening (2.2.5) to the upper portion (2.1) is completed, and the outer surface of the middle tube and the inner surface of the outer tube forms a second chamber (2.2.3) which is closed in the direction of the lower section (2.3) by a piston (2.3.2) and in the direction of the upper section (2.1) through an opening (2.2. 5) to the upper section (2.1) abge is closed.

6. multi-chamber cartridge (2) according to one of claims 3 to 5, wherein the tubular empty space (2.2.1) of the receptacle of the inner tube (1 .4) of the cartridge holder (1) according to claim 1 is used.

7. A multi-chamber cartridge (2) according to any one of claims 3 to 6, wherein the tubular void (2.2.1) is enclosed by a tube and also the tube through the lower portion (2.3) of the multi-chamber cartridge (2) extends.

8. Metering and mixing device comprising

i. a cartridge holder (1) comprising

(A) a receptacle (1 .1) for multi-chamber cartridges (2), and

(b) one compressed air connection (1 .2) and one connection (1 .3) for one

Application device, and

ii. a multi-chamber cartridge (2) for a cartridge holder (1) according to i., Wherein includes the following sections:

an upper portion (2.1) comprising a directional control valve (2.1 .1);

a middle section (2.2) whose center is designed in the direction of the longitudinal axis as a tubular space provided with static mixing elements (1 .5), and the tubular space is enclosed by at least two chambers (2.2.2 and 2.2.3), the Chambers are arranged tubular and in the direction of the longitudinal axis of the cartridge and adjacent chambers by a common partition wall (2.2.4) are separated from each other and each chamber with the upper portion (2.1) above each

at least one opening (2.2.5) is connected; and

9. Multi-chamber cartridge (2) for a dosing and mixing device according to claim 8, comprising:

an upper portion (2.1) comprising a directional control valve (2.1 .1);

a middle section (2.2) whose center is designed in the direction of the longitudinal axis as a tubular space provided with static mixing elements (1 .5), and the tubular space is enclosed by at least two chambers (2.2.2 and 2.2.3), the Chambers are arranged tubular and in the direction of the longitudinal axis of the cartridge and adjacent chambers are separated by a common partition (2.2.4) and each chamber is connected to the upper portion (2.1) via at least one opening (2.2.5); and a lower section (2.3) comprising for each of the chambers a piston (2.3.1 and 2.3.2), the pistons (2.3.1 and 2.3.2) defining the chambers (2.2.2 and 2.2.3) of seal tightly below and with each other via cutting devices (2.3.3) are connected, and the cutting devices (2.3.3) are arranged so that they the common partition wall (2.2.4) respectively adjacent chambers when

A multi-chamber cartridge (2) according to claim 9, wherein the tubular space provided with static mixing elements (1, 5) is enclosed by at least two chambers (2.2.2 and 2.2.3), the chambers being tubular and in the direction of the longitudinal axis of the cartridge are arranged coaxially.

1 1. Multi-chamber cartridge (2) according to one of claims 3 to 7, 9 or 10 or as part of a dosing and mixing device according to one of claims 1 or 8, wherein the cutting devices (2.3.3) in the form of wedge-shaped gaps

are executed.

12. Multi-chamber cartridge (2) according to one of claims 3 to 7 or 9 to 1 1 or as part of a dosing and mixing device according to one of claims 1 or 8, wherein in the directional control valve (2.1 .1) a premixing chamber is integrated.

13. Method for conveying, metering and mixing two or more

Components, characterized in that for carrying out the method, a metering and mixing device according to one of claims 1 or 8 is used.

14. A method for coating substrates with two- or multi-component coating compositions, characterized in that for applying a

Coating the metering and mixing device is connected according to one of claims 1 or 8 with a paint spray gun, the components pneumatically conveyed and mixed in the upper section (2.1) of the metering and mixing device and in the opposite direction by the static mixing elements (1 .5) be, and then the resulting homogeneous mixture of components of the application device is supplied and applied via this to the substrate.

15. The method according to claim 14, wherein the application is interrupted once or several times, the multi-chamber cartridge (2) is cleaned within the interruption of the application and the application after cleaning the

Multi-chamber cartridge (2) with the same multi-chamber cartridge (2) or another multi-chamber cartridge (2) as defined in any one of claims 3 to 7 or 9 to 1 1 is continued.